#107 - HP 33120A function generator repair

This unit produced wrong output amplitudes. The problem was traced to a faulty ceramic bypass capacitor affecting one of the attenuation stages. After replacing the capacitor the amplitudes looked much better, but still off. Apparently someone tried calibrating the unit while the hardware was misbehaving. Fresh calibration fixed the problem.

Видео #107 - HP 33120A function generator repair канала FeedbackLoop